Electricity and magnetism - Current Electricity-14

865

Using symmetry, points B & C; and E & F are equivalent. Further simplification of the circuit leads to the equivalent resistance which is 10 ohm.

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Akash Anand Excellent work..keep it up
Upvote·0· Reply ·Jul 5 '13 at 7:21
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Shaswata Roy ·Jul 6 '13 at 3:29

It can be seen from the above diagram that

$\mathcal{R}_{eq}=\frac{20\times 20}{20+20}=10\Omega$

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Akash Anand Good Work
Upvote·0· Reply ·Jul 8 '13 at 1:19
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Hamza-Ul-Huda ·Jul 6 '13 at 11:43

Further simplifications leads the circuit as below :

R(equivalent)=1/40 + 1/20 + 1/40
= 10 ohm(Ans)
i guess

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Akash Anand Good Work
Upvote·0· Reply ·Jul 8 '13 at 1:19
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Soumyadeep Basu ·Jul 4 '13 at 7:00

10 ohm.

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Akash Anand Excellent Job..make sure you have a correct logic/explanation for that
Upvote·0· Reply ·Jul 4 '13 at 23:03
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Dwijaraj Paul Chowdhury ·Jul 4 '13 at 8:19

0 ohm???

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Akash Anand Wrong ...try again.
Upvote·0· Reply ·Jul 4 '13 at 23:01
Akash Anand You tell me just one thing..resistance never can be negative..then how did you get zero???????
Upvote·0· Reply ·Jul 4 '13 at 23:04
Dwijaraj Paul Chowdhury IDK....how can we solve this question?
Upvote·0· Reply ·Jul 5 '13 at 8:01
Dwijaraj Paul Chowdhury Whats symmetry??
Upvote·0· Reply ·Jul 5 '13 at 8:02
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Rudra Sen ·Jul 4 '13 at 8:57

70/3 ohm ?

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Akash Anand Wrong ...try again.
Upvote·0· Reply ·Jul 4 '13 at 23:02
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Anuradha Yadav ·Jul 4 '13 at 9:09

8.33 ohm

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Akash Anand Wrong ...try again.
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Sourup Nag ·Jul 4 '13 at 21:02

30 ohm?

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Akash Anand Wrong ...try again.
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Soumyadeep Basu ·Jul 5 '13 at 8:02

Sir, if the circuit wasn't symmetrical then would star-delta transformation have been the best method?

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Akash Anand ALWAYS
Upvote·0· Reply ·Jul 8 '13 at 1:17
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Shreya Sharma ·Jul 5 '13 at 23:34

Will the resistances EF and BC be ignored?

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Akash Anand Yeah (think why??)
Upvote·0· Reply ·Jul 8 '13 at 1:19
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